The two subpoenas mark an ongoing fight between the White House and Congress as House Democrats seek to compel the testimony of other current and former administration officials as part of their sprawling investigations into Trump and his administration.

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A representative for Donaldson's law firm did not immediately return a request for comment on Tuesday. Bob Trout, an attorney for Hicks, declined to comment.

The subpoena orders Hicks to provide documents by June 4 and then to testify before the Judiciary Committee on June 19.

A separate subpoena requires Donaldson to turn over a tranche of documents to the committee by June 4 and demands her appearance at a deposition on June 24.

Donaldson is said to have kept detailed notes about the meetings with McGahn that she sat in on and such notes were frequently mentioned in Mueller’s report. Hicks also played a pivotal role as a trusted adviser in Trump’s inner circle, following him from the early days of his presidential campaign and into the White House.

Nadler already issued a subpoena for documents and testimony from McGahn, but the former White House counsel has declined to comply with the requests at the direction of the White House.

The news of the subpoenas came the same day that McGahn evaded public testimony before the committee on instructions from Trump, who cited a Department of Justice legal opinion that McGahn is immune from compelled congressional testimony.